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What is difference between relative file and indexed sequential file?

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Answer:

Relative:-

1. In this mode the content of the program counter is added to the address part of the instruction to obtain the effective addressed.

2. Effective Address = Contents of the program counter + contents of address field.

3. No extra index bit is used.

4. Example:-
EA = [ BX ] + [ SI ] + disp.
EA = [ BX ] + [ DI ] + disp.

Indexed:-

1. In this mode of addressing an attempt is made to avoid the use of two addressed for an operand.

2. Effective Address = Address field + contents of the specified - index registers.

3. In this extra index bit is used.

4. Example:-
EA = [ BX ] + [ SI ]
EA = [ BX ] + [ DI ]

First answer by Pbdl. Last edit by Pbdl. Contributor trust: 0 [recommend contributor ]. Question popularity: 2 [recommend question].

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